New feature of PowerCrp library: Smart Card Support

[SlavkoDam]

Hello,

Modern applications require using certificate and certificate keys on smart card. I developed new features in the PowerCrp library to support smart card, with the following functionalities:

1. SSL/TLS client can set client certificate on smart card.

2. Certificate store functions support smart card as the location of certificate store.

3. New PKCS11 functions

- List smart card readers and smart cards
- List certificates and certificate keys on smart card
- Retrieve certificate and certificate key from smart card
- Encrypt/decrypt data with certificate keys on smart card
- Sign/verify data with certificate keys on smart card